Abstract
Although prostaglandin synthesis in reptilian tissues has not been previously documented, studies have demonstrated that this class of hormones influences several aspects of reptilian reproductive biology. Gas chromatographic analysis for prostaglandin (PG) precursors in oviductal and hepatic tissues of the viviparous lizard Sceloporus jarrovi revealed that eicosatrienoic acid (monoenoic series precursor) and arachidonic acid (dienoic series precursor) were present. No eicosapentaenoic acid (trienoic series precusor) was detected in either tissue. Ovary, oviduct, liver, testis, and epididymis synthesized in vitro compounds which migrate with authentic series 2 (dienoic) PG standards on TLC. Furthermore, in vitro incubation of hepatic tissue produced significant amounts of PGF2 and PGE2 in the culture media. These data indicate that reptiles synthesize PG's as do other vertebrates. Prostaglandins (PG's) are potent local hormones or parahormones synthesized from polyunsaturated fatty acid precursors by tissues from mammals, birds, amphib- ians, fishes, and a number of invertebrate
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